Name: viR10068 Date: 08/13/2001


The simple test for jni function GetDirectBufferCapacity() is failed
on the jdk1.4.0-beta_refresh-b74 due to wrong behavior of function.
This function returns 0 instead of size of buffer.

To reproduce:
1. compile the gdbc00101m1.java
   Used: javac -d . gdbc00101m1.java
2. compile the gdbc00101m1.c
   Used: cc -G -KPIC -o libjckjni.so -Iinclude gdbc00101m1.c
   In 'include' directory you should place 3 files (see attachments):
   % ls include
   jckjlong_md.h jckjni.h jckjni_md.h

3. set environment variable LD_LIBRARY_PATH to working directory
4. run gdbc00101m1
   Used: java -Xfuture javasoft.sqe.tests.vm.jni.gdbc001.gdbc00101m1.gdbc00101m1

Execution log:
% java -version
java version "1.4.0-beta_refresh"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta_refresh-b74)
Java HotSpot(TM) Client VM (build 1.4.0-beta_refresh-b74, mixed mode)
% java -Xfuture javasoft.sqe.tests.vm.jni.gdbc001.gdbc00101m1.gdbc00101m1
Create new direct buffer: java.nio.DirectByteBuffer[pos=0 lim=8 cap=8]
Check of buffer Capacity failed. Size 0 instead of 8
Change position in buffer: java.nio.DirectByteBuffer[pos=3 lim=8 cap=8]
sliced buffer size 0 should be 5
Check of sliced buffer Capacity failed
Buffer capacity in short 2
java.lang.IllegalArgumentException
        at
javasoft.sqe.tests.vm.jni.gdbc001.gdbc00101m1.gdbc00101m1.getDirectBufferCapacit
y(Native
Method)
        at
javasoft.sqe.tests.vm.jni.gdbc001.gdbc00101m1.gdbc00101m1.testChecks(gdbc00101m1
.java:42)
        at
javasoft.sqe.tests.vm.jni.gdbc001.gdbc00101m1.gdbc00101m1.run(gdbc00101m1.java:8
9)
        at
javasoft.sqe.tests.vm.jni.gdbc001.gdbc00101m1.gdbc00101m1.main(gdbc00101m1.java:
93)
Unexpected exception: java.lang.IllegalArgumentException
%

---------------------------gdbc00101m1.java ---------------------------
package javasoft.sqe.tests.vm.jni.gdbc001.gdbc00101m1;

import java.io.PrintStream;
import java.nio.ByteBuffer;
import java.nio.ShortBuffer;
import java.nio.IntBuffer;

public class gdbc00101m1 {

    private static native long getDirectBufferCapacity(Object buf);

    public static int testChecks(PrintStream out) {

        boolean res = false;

        try {
            ByteBuffer buf = ByteBuffer.allocateDirect(8);
            out.println("Create new direct buffer: "+buf);
            if (getDirectBufferCapacity(buf) != 8) {
                out.println("Check of buffer Capacity failed. Size "
+getDirectBufferCapacity(buf)+ " instead of "+buf.capacity() );
                res = true;
            }
            buf.position(3);
            out.println("Change position in buffer: "+buf);
            ByteBuffer buf2 = buf.slice();
            out.println("sliced buffer size "+getDirectBufferCapacity(buf2)+ "
should be "
+buf2.capacity());
            if (getDirectBufferCapacity(buf2) != 5) {
                out.println("Check of sliced buffer Capacity failed");
                res = true;
            }
            ShortBuffer shortBuf = buf.asShortBuffer();
            out.println("Buffer capacity in short "+shortBuf.capacity());
            if (getDirectBufferCapacity(shortBuf) != shortBuf.capacity()) {
                out.println("Check of ShortBuffer Capacity failed");
                res = true;
            }

            IntBuffer intBuf = buf.asIntBuffer();
            out.println("Buffer capacity in int "+intBuf.capacity());
            if (getDirectBufferCapacity(intBuf) != intBuf.capacity()) {
                out.println("Check of IntBuffer Capacity failed");
                res = true;
            }

        } catch (Exception e) {
            e.printStackTrace();
            out.println("Unexpected exception: " + e);
            res = true;
        }

        if(res)
            return 2/*STATUS_FAILED*/;
        return 0/*STATUS_PASSED*/;
    }

    static String loadLibraryStatus = "";
    static {
        if(!loadLib("gdbc00101m1"))
            loadLib("jckjni");
    }

    static boolean loadLib(String libName){
        try {
            System.loadLibrary(libName);
            loadLibraryStatus = null;
            return true;
        } catch (SecurityException e) {
            loadLibraryStatus += "loadLibrary(\"" + libName + "\") throws: " +
e + "\n";
        } catch (UnsatisfiedLinkError e) {
            loadLibraryStatus += "loadLibrary(\"" + libName + "\") throws: " +
e + "\n";
        }
        return false;
    }

    public static int run(String argv[], PrintStream out) {

        if (loadLibraryStatus!=null) {
            out.println("Library loading:\n" + loadLibraryStatus);
        }
        return testChecks(out);
    }

    public static void main(String argv[]) {
        System.exit(run(argv, System.out) + 95/*STATUS_TEMP*/);
    }
}
---------------------------gdbc00101m1.c ---------------------------
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "jckjni.h"

#ifdef __cplusplus
extern "C" {
#endif

#ifndef JNI_ENV_ARG

#ifdef __cplusplus
#define JNI_ENV_ARG(x, y) y
#define JNI_ENV_PTR(x) x
#else
#define JNI_ENV_ARG(x,y) x, y
#define JNI_ENV_PTR(x) (*x)
#endif

#endif


JNIEXPORT jlong JNICALL
Java_javasoft_sqe_tests_vm_jni_gdbc001_gdbc00101m1_gdbc00101m1_getDirectBufferCa
pacity
(JNIEnv *env, jobject obj, jobject buf) {
    return JNI_ENV_PTR(env)->GetDirectBufferCapacity(JNI_ENV_ARG(env,buf));
}

#ifdef __cplusplus
}
#endif
---------------------------

The new JCK test
vm/jni/GetDirectBufferCapacity/gdbc001/gdbc00101m1/gdbc00101m1.html
is failed due to this bug.

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